Apparatus for manufacturing glass pipe.



Nn'. 639,509. Patented Dec. l9, I899.

J. W. BONTA.

APPARATUS FOR MANUFACTURING GLASS PIPE (Application filed Nov. 11, 1897.Renewed Oct. 21, 1899.)

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Patented Dec. [9, I899. J. W. BDNTA.

APPARATUS FOR MANUFACTURING GLASS PIPE.

(Application filed. Nov. 11, 1897. Renewed Oct. 21, 1899.)

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rte STATES PATENT Farce.

JAMES W. BONTA, OF WVAYNE, PENNSYLVANIA, ASSIGNOR TO THE BONTA GLASSPIPE AND CONDUIT COMPANY, OF SCRANTON, PENNSYLVANIA.

APPARATUS FOR MANUFACTURING GLASS PIPE.

SPECIFICATION forming part of Letters Patent No. 639,509, dated December19, 1899.

Application filed November 11,1897. Renewed October 21, 1899. Serial No.734,404. (No model.)

To aZZ whom it may concern.-

Be it known that I, JAMES W. BONTA, a citizen of the United States, anda resident of Wayne, Delaware county, State of Pennsyl- Vania, haveinvented certain new and useful Apparatus for Manufacturing Glass Pipe,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming part of this[0 specification.

My invention relates to certain improvements in apparatus formanufacturing pipe, and has for its principal object to provide animproved form of contractile core, more estg pecially adapted for use inthe manufacture of glass pipe, as more fully set forth hereinafter.

In the accompanying drawings, Figure 1 is atransverse sectionalelevation of an appa- 7 2'0 ratus for manufacturing glass pipe illustrating a contractile core constructed in accordance with my invention. Fig.2 is a similar view of the core proper in a contracted position. Fig. 3is an elevation of one end of the core; and Fig. tis a longitudinalsectional elevation of the core on the line 4 4, Fig. 3.

Referring to the drawings, A represents the bottom section of a moldformed of iron or other suitable material, and to this bottom sectionare hinged top or side sections a, the point of connection or contactbetween the hinged sections being on the horizontal diameter of themold, so that when the top sections are thrown back or removed the pipemay be readily removed and transferred to the annealing-oven. The topsections a are separated at the upper central portions of the mold by aspace sufficient to permit the pouring of the glass, and the hingesb,which serve to connect the sections, are of the ordinarypin-and-socket construction, so that when occasion requires the sectionsmay by readily separated from each other.

The inner diameter of the pipe manufac- 4'5 tured is governed by acontractile core B,com-

prising a base-section 0, side Wings 0, hinged thereto, and aradially-movable filling-bar G On the base-section O are an umber ofblocks 1), adapted for the support and guidance of a shaft E, to whichare secured end platesG,

having cam-slots g, and at intervals throughout the length of the shaftare secured blocks G, having similarly-slotted cams g. The filling-bar Ois of T shape in cross-section, and its central depending Web or flangec is adapted to slotted guideways d, formed in the upper portions of theblocks D, so that the bar in its movement toward and from the center ofthe core will be guided in a radial line. To the Web or flange c of thefillingbar are secured at intervals a number of plates H, slotted at h,so that they may pass around the shaft E, the slot being of a widthsomewhat greater than the diameter of the shaft, so that said shaft willact as a guide to retain the plates in proper position. Each plate Hcarries a stud or antifriction-roller i, adapted to one of the cam-slotsg, the arrange ment and operation being such that on the turning of theshaft the cams, through the antifriction-rollersi and plates H, will actto move the filling-bar toward and from the center of the core.

The side sections or Wings 0 are hinged at c to the edges of thebase-sections C, and in order to prevent the entrance of anymaterial tothe interior of the core the point of contact between the base-sectionsand the hingesections is concentric to the center of the hinge-pivot.The opposite ends of the hinged sections 0" are cut away at l to form acomparatively sharp edge, so that after the filling-bar commences itsinward movement in the contraction of the core the hinged sections willbe free to move from the position shown in Fig. 1 to that illustrated inFig. 2, the necessary inward movement of thehinged sections being givenby the downward movement of the plates H, which are connected by links mto lugs m on the inner surfaces of said hinged sections.

In the manufacture of a pipe-section the mold and core, having beenpreviously heated to a degree sufficient to prevent the checking of theglass, are placed in position with the 5 core fully expanded, and moltenglass is gradually poured into the mold through the space between thesections a until a sufficient quantity of glass has been introduced toform the pipe-sections. The contact of the glass with the metal of themold and core will almost immediately reduce the temperature of theglass, and the resultant contraction would destroy the pipe if the corewere. to remain for any length of time in its fully-expanded position.To permit the gradual contraction of the glass and at the same time toafford a support for the mass of glass before it has set and While in asemiplastic condition the core is contracted by turning of the shaft Eand causing the cams g to act upon the filling-bar and the hingedsections of the core. The turning of the shaft is readily effected by mcans of small rods n, projecting; from one of the end plates G, andthese may also be employed in the removal of the core after the pipe hasset, sufficiently to permit of its removal to the annealing-oven.

Having thus described my invention, What I claim, and desire to secureby Letters Patent, is

1. The combination in a contractile core, of the base-section,guiding-blocks thereon, a shaft adapted to bearings in said blocks, aradially-movable filling-bar guided in said blocks, side sections hingedto the base-section, operating-cams carried by the shaft, and connectedto the filling-bar, and means for mechanically connecting the hingedside sections to said cams, substantially as specified.

2. The combination in a contractile core, of

the base-section, guiding-blocks thereon, a shaft adapted to bearings insaid blocks, operating-cams on said shaft, a radially-movablefilling-bar guided by said blocks, radiall y-movable plates connectingthe filling-bar and cams, side sections hinged to the base-section, andlinks connecting said side sections to said radially-removable plates,substantially as specified.

The combination in a contractile core, of the base-section,0,havingguiding-blocks, D, side sections, 0', hinged at the opposite edgesof the base section, a Webbed filling bar guided radially in saidblocks, D, a shaft, E, supported by the blocks, D, slotted cams carriedby said shaft, slotted plates, H, connected to the Webbed filling-barand guided at their lower ends by said shaft, studs, "5, carried by theplates and adapted to the camslots, and links, m, connecting the hingedsections to said plates, H, substantially as specified.

In Witness whereof I have hereunto set my hand this 11th day of October,A. D. 1897.

JAMES W. BONTA.

Witnesses:

EDMUND S. MILLs, J NO. E. PARKER.

